We present measurements of CP-violating asymmetries in the decay B0→a1±(1260)π∓ with a1±(1260)→π∓π±π±. The data sample corresponds to 384×10^6 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We measure the CP-violating asymmetry ACPa1π=-0.07±0.07±0.02, the mixing-induced CP violation parameter Sa1π=0.37±0.21±0.07, the direct CP violation parameter Ca1π=-0.10±0.15±0.09, and the parameters ΔCa1π=0.26±0.15±0.07 and ΔSa1π=-0.14±0.21±0.06. From these measured quantities we determine the angle αeff=78.6°±7.3°.
Measurements of CP-Violating Asymmetries in B0→a1±(1260)π∓ Decays
SIMI, GABRIELE;GAZ A;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;
2007
Abstract
We present measurements of CP-violating asymmetries in the decay B0→a1±(1260)π∓ with a1±(1260)→π∓π±π±. The data sample corresponds to 384×10^6 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We measure the CP-violating asymmetry ACPa1π=-0.07±0.07±0.02, the mixing-induced CP violation parameter Sa1π=0.37±0.21±0.07, the direct CP violation parameter Ca1π=-0.10±0.15±0.09, and the parameters ΔCa1π=0.26±0.15±0.07 and ΔSa1π=-0.14±0.21±0.06. From these measured quantities we determine the angle αeff=78.6°±7.3°.File in questo prodotto:
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